Abstract
Upper Indus Basin (UIB) is critical for Pakistan’s economy as it is glacial incomposition and snow melt that provides 80% of the fresh water to Indus River. Decadal fluctuationsin the precipitation in UIB during 1980-2010, using interpolation technique in Arc Map were exploredin present study. The results provided a positive correlation between the winter precipitation andsummer runoff in middle elevation basins of UIB. The map of decadal difference of mean annualrainfall (1980-2010), prepared in Arc Geographic Information System 9.0, revealed that around Gilgit,Skardu, Astore, Chilas and Bunji, was found the least difference in mean annual rainfall, i.e. of -1.68 to-2.14mm, whereas area around Kakul experienced maximum rainfall decadal difference ranged from-13.63 to -17.45mm. The study suggested that south of lesser Himalayan areas experienced maximum rainfall variability during the period 1980-2010, whereas, lesser variability in north of Himalayan areas inferred safer addition in fresh water in Indus from its glacial reserve.
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